Mine.



L. LHEURE.

MINE.

APPLICATION FILED JAN. 27, 1905.- 905,336, Patented Dec. 1, 1908 6Z2 vmz Zr mic/M a uy'l Jzaue I UNITED STATES PATENT oFFicE.

To all whom it may concern:

Be it known that I, LOUIS LHEURE, citizen of France, residing at Paris, France, --have invented certain new and useful Im- 5 provements in Mines, of which the following is a specification.

Thls invention relates to improvements in mines and the object of the invention is to use in mines nitrate of ammonia exclusively as the explosive.

Up to the present it has'been impossible I to bring about in practice the explosion of nitrate of ammonia by itself and all writers rare agreed in recognizing this body as practically inexplosive. Nitrate of ammonia has of course been employed in the manufacture of explosives as a component but never as an explosive by itself. V The present invention has for its object to construct a mine which ermits of obtaining the detonation of this slightly sensitive substance.

In the accom anying drawings the improved mine is sl iown in Figure 1 in vertical section. Fig. 2 represents in vertical section a modification of Fig. 1.

The improved mine is arranged as follows: Into the charge a of nitrate of ammonial a detonatin tube b of a' sufliciently large diameter is introduced for the whole or apart of the length of the charge. e detonating tube '6 consists of a tube filled with trinitrotoluene or trinitrobenzin or with another suitable substance.

The detonating tube 5 is capable of being excited either directly by a detonator c of Specification of Letters Patent.

Application filed January 27, 1905. Serial No. 242,943.

Patented Dec. 1, 1908.

I fulminate of mercury placed in its top part (Fig. 1) or without detonator merely by a detonating tube .6. of smaller diameter extending from the shot hole and receiving its ignition from the outside (Fig. 2).

The detonator 0 (Fig. 1) is fired by the fuse d as usual.

It is indispensable that the tampin of the explosive should be done in acare l and satisfactory manner for the explosion to be complete.

In' the carrying out of this method of using nitrate of ammonia,-the same may be employed either in the pulverulent state or in-crystals, or referably in the form of compressed cartri ges, which are provided with a gentral hole or passagefor the detonating tu e.

What I do claim and desire to secure by Letters Patent is: a

An improved mine consisting of nitrate of ammonia exclusively as explosive having a detonating tube of sufliciently large diameter inclosed in the charge for the whole length of. the same, a detonator of fullninate of mercur V for igniting the detonating tube and a se for firing the detonator from outside the mine, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing wltnesses.

LOUIS LHEURE.

Witnesses J OHN BAKER, FREY. 

